FP trendJuly 31, 2020 5:47:45 PM IS
Scientists have now found that deep-sea anglerfish have developed a kind of sexual parasitism for reproduction. According to a study published in the magazine scienceMales of the species bind permanently to females through a form of anatomical connection that is otherwise not seen in nature.
The tiny male monkfish fuses its tissue with a more massive female during copulation, so that the two can share not only sperm, but also blood and skin.
While it was not previously known how the two managed not to be rejected by the other̵
In vertebrates, immune protection involves a physical reaction called adaptive immunity that identifies a foreign threat and then works to eliminate it. Thus, there remains a risk in times of organ transplants. However, the missing genes of the deep-sea anglerfish allow the fusion.
Thomas Boehm, immunologist at the Max Planck Institute for Immunobiology and Epigenetics in Freiburg, and colleagues were able to isolate DNA from 31 preserved anglerfish representing 10 deep sea species. They found that in four of these species the males temporarily stick to the females, while in the other six species the fusion is permanent. The same was not observed in shallow waters.
According to Boehm, anglerfish species that fuse do not have antibodies, including genes that make up parts of T cells, that help identify foreign tissues and pathogens.
According to anglerfish report – Photocorynus spiniceps and Haplophryne mollis– If multiple men can bind to a single woman, antibodies may not be formed at all.
Böhm adds: “If I had to diagnose [those two fish] … I would say, ‘OK, that’s a red alarm, we really have to do something because this is a severe combined immunodeficiency. Deadly forecast. “
The study highlights the various forms that creatures’ immune systems can take, suggesting that anglerfish may have an adaptive immune system that is completely different from other vertebrates.
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